# MinIO Server Debugging Guide [![Slack](https://slack.min.io/slack?type=svg)](https://slack.min.io) [![Docker Pulls](https://img.shields.io/docker/pulls/minio/minio.svg?maxAge=604800)](https://hub.docker.com/r/minio/minio/)

## HTTP Trace

HTTP tracing can be enabled by using [`mc admin trace`](https://docs.min.io/community/minio-object-store/reference/minio-mc-admin/mc-admin-trace.html) command.

Example:

```sh
minio server /data
```

            private static final long serialVersionUID = 1L;

            @Override
            public String get(String key) {
                // Override to return empty string instead of null to avoid NullPointerException
                return "";
            }

            @Override
            public String getIndexFieldTitle() {
                return "title";
            }

      .assertLogMatch(Regex("""connectStart: ${url.host}/.+ DIRECT"""))
      .assertLogMatch(Regex("""secureConnectStart"""))
      .assertLogMatch(
        Regex(
          """connectFailed: null \S+(?:SSLProtocolException|SSLHandshakeException|TlsFatalAlert): .*(?:Unexpected handshake message: client_hello|Handshake message sequence violation, 1|Read error|Handshake failed|unexpected_message\(10\)).*""",
        ),

  }

  public void testStringConverter_nullConversions() {
    assertThat(Shorts.stringConverter().convert(null)).isNull();
    assertThat(Shorts.stringConverter().reverse().convert(null)).isNull();
  }

  public void testStringConverter_reverse() {
    Converter<String, Short> converter = Shorts.stringConverter();

        "language":   "indonesian"
      },
      "italian_elision": {
        "type":         "elision",
        "articles": [
          "c", "l", "all", "dall", "dell",
          "nell", "sull", "coll", "pell",
          "gl", "agl", "dagl", "degl", "negl",
          "sugl", "un", "m", "t", "s", "v", "d"
        ]
      },
      "italian_stop": {
        "type":       "stop",

   * @return an array containing the same values as {@code collection}, in the same order, converted
   *     to primitives
   * @throws NullPointerException if {@code collection} or any of its elements is null
   */
  public static char[] toArray(Collection<Character> collection) {
    if (collection instanceof CharArrayAsList) {
      return ((CharArrayAsList) collection).toCharArray();
    }

   * @return an array containing the same values as {@code collection}, in the same order, converted
   *     to primitives
   * @throws NullPointerException if {@code collection} or any of its elements is null
   * @since 1.0 (parameter was {@code Collection<Short>} before 12.0)
   */
  public static short[] toArray(Collection<? extends Number> collection) {
    if (collection instanceof ShortArrayAsList) {

   * @return an array containing the same values as {@code collection}, in the same order, converted
   *     to primitives
   * @throws NullPointerException if {@code collection} or any of its elements is null
   * @since 1.0 (parameter was {@code Collection<Short>} before 12.0)
   */
  public static short[] toArray(Collection<? extends Number> collection) {
    if (collection instanceof ShortArrayAsList) {

   *
   * @throws NumberFormatException if the string does not contain a valid unsigned {@code int} value
   * @throws NullPointerException if {@code s} is null (in contrast to {@link
   *     Integer#parseInt(String)})
   */
  @CanIgnoreReturnValue
  public static int parseUnsignedInt(String s) {
    return parseUnsignedInt(s, 10);
  }

  /**

///

```Python
commons: CommonQueryParams = Depends()
```

////

You declare the dependency as the type of the parameter, and you use `Depends()` without any parameter, instead of having to write the full class *again* inside of `Depends(CommonQueryParams)`.

The same example would then look like:

{* ../../docs_src/dependencies/tutorial004_an_py310.py hl[19] *}

...and **FastAPI** will know what to do.